Inside the stripe mod zip, you will see a "/includes" folder. This is the catalog side. If this was the admin side you will see the includes inside the folder admin. Payment mods are all installed in the catalog side. EVERYTHING inside the includes folder gets put in your catalog side includes folder.
Advice for you is that I hope you are installing new mods in a test site. If not, make sure you do a complete backup of your files and database. This will ensure that you can revert back if anything goes wrong.
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